(19)

(11)

EP 0 992 139 A1

(12)

(43) Date of publication: 12.04.2000 Bulletin 2000/15 (21) Application number: 98937753.6 (22) Date of filing: 13.08.1998

(51) International Patent Classification (IPC)7: H04L 9/08, H04L 9/16, H04L 9/30 (86) International application number: PCT/IL9800/381 (87) International publication number: WO 9909/700 (25.02.1999 Gazette 1999/08)

(84) Designated Contracting States: BE DE DK FR GB (30) Priority: 14.08.1997 IL 12155197 (71) Applicant: Barkan, Mordhay Petah Tikva 49600 (IL)	(72) Inventor: Barkan, Mordhay Petah Tikva 49600 (IL) (74) Representative: VOSSIUS & PARTNER  Postfach 86 07 67 81634 München 81634 München (DE)